HYDROIDS OF WOODS HOLE. 3/1 



floating Sargassum. I have hunted carefully over later collec- 

 tions of gulf weed but without finding trace of it. 



CALYPTOSPADIX CERULEA Clarke. 



On August 7, 1908, 1 found growing on the sides of the steamer 

 Fish Hawk, at Woods Hole, several fine colonies of this hydroid, 

 originally described by Clarke, 1 and so far as I am aware has 



FIG. 2. 



not since been a subject of record. In general aspects and size 

 it resembles Bougainvillia, and was in the present instance 

 thought to be that hydroid. A closer scrutiny soon revealed its 

 marked differences. 



Its original description from Chesapeake Bay, and its occur- 

 rence on the Fish Hawk, which had only a month previous come 

 from Norfolk, at once suggested the probability of its having 

 been thus transported to this locality. It is not strange, there- 



^ Mem. Bost. Soc. Nat. Hist., Vol. III., 1882, p. 136. 



